A student-led experiment has shown that the search for dark matter doesn’t always require massive infrastructure.
Modern cosmology is often associated with large observatories, complex instruments, global collaborations, and major funding. Even so, progress remains possible through smaller, flexible efforts led by young researchers and supported by institutional resources and creative problem solving, including in the ongoing search for dark matter.
In a recent study , a team of undergraduate students at the University of Hamburg designed and built a cavity detector to look for axions, a leading dark matter candidate. Despite limited resources, they established new experimental constraints on axion properties, demonstrating that compact experiments can still contribute to one of physics’ biggest unanswered questions.
Searching for dark matter
“The benefit of working with dark matter, or axions, is that we expect it to be present everywhere in our galaxy,” says Agit Akgümüs, first author of the study with Salama, currently pursuing an M.Sc. in Mathematical Physics at the University of Hamburg. “So essentially, no matter where you perform the experiment, you have some dark matter on your hand you can do experiments with.”
The team used their funding to assemble the experimental setup, beginning with a resonant cavity made from highly conductive materials, along with electronics, cabling, supports, and measurement devices. “The detector we built is essentially the simplest version of a cavity detector for dark matter,” says Salama.
They also relied on existing infrastructure and equipment provided by the university and collaborating groups rather than building everything from scratch. The system was then tested, calibrated, and operated to collect data.
“We reduced very complex experiments to their essential components,” says Salama. “The result is a less sensitive setup, limited to a small search window, but still capable of producing new scientific data.”
